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Pollution in the Ocean Everything Flows Downhill

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Pollution in the Ocean Everything Flows Downhill POLLUTION IN THE OCEAN Everything Flows Downhill This Report Is Part Of The Ocean On The Edge Series Produced By The Aquarium Of The Pacific As Products Of Its National Conference—Ocean On The Edge: Top Ocean Issues, May 2009 2 POLLUTION IN THE OCEAN Ocean on the Edge: Top Ocean Issues Making Ocean Issues Come Alive for the Public The conference brought together leading marine scientists and engineers, policy-makers, film-makers, exhibit designers, informal science educators, journalists and communicators to develop a portfolio of models for communicating major ocean issues to the public. This report is one of a series of reports from that conference. The reports include: Coastal Hazards, Marine Ecosystems and Fisheries, Pollution in the Ocean, and Critical Condition: Ocean Health and Human Health. There is also a series of briefer reports on film-making, kiosk messaging design, and communicating science to the public. All reports are available at www.aquariumofpacific.org POLLUTION IN THE OCEAN 3 4 POLLUTION IN THE OCEAN Acknowledgements Support for the “Ocean on the Edge Confer- Pacific’s Conference, “Ocean on the Edge: ence: Top Ocean Issues” was provided by Top Ocean Issues” held in May 2009, at Long NOAA, the National Science Foundation, Beach Convention Center. Participants in the Southern California Edison, SAVOR, the Long pollution workshop session included: Steve Beach Convention Center, and the Aquarium Weisberg, Larry Swanson, Jenny Jay, Mike of the Pacific. We are grateful to the Confer- Connor, Dallas Weaver, Karen Setty, James ence’s National Advisory Panel that provided Wood, Elizabeth Keenan, and Dave Bader. valuable guidance in selecting participants The session was facilitated by Steve Weisberg and in reviewing sections of this report. and Larry Swanson. James Wood, Dave Bader and Elizabeth Keenan served as rapporteurs. This report is based very loosely on the The document was edited by Karen Setty and report, “Pollution in the Ocean” published Jerry Schubel. by the National Academies in their Ocean Science Series which formed the starting point of discussion at the Aquarium of the POLLUTION IN THE OCEAN 5 National Advisory Panel D. James Baker Tom Bowman John Byrne Michael Connor James Cortina Joseph Cortina Robert Dalrymple Lynn Dierking William Eichbaum John Falk Alan Friedman Martha Grabowski Mary Nichol William Patzert Shirley Pomponi William Reeburgh Jonathan Sharp 6 POLLUTION IN THE OCEAN Table of Contents Introduction .....................................................9 Universal Dumping Ground . 9 Consequences of Pollution . .9 What can we do? . .9 Know your Pollutant . 9 Marine Debris ....................................................11 Consequences........................................................11 Sources . .11 Solutions............................................................12 Nutrients ........................................................14 Consequences........................................................14 Sources and Mechanisms ...............................................15 Solutions............................................................16 CO2 ............................................................19 Consequences........................................................19 Sources and Mechanisms ...............................................20 Solutions............................................................20 Toxicants ........................................................22 Consequences........................................................22 Sources and Mechanisms ...............................................23 Solutions............................................................24 Fecal Wastes .....................................................25 Consequences........................................................25 Sources and Mechanisms ...............................................26 Solutions............................................................27 Oil .............................................................28 Consequences........................................................28 Sources and Mechanisms ...............................................29 Solutions............................................................29 Noise ...........................................................31 Consequences........................................................31 Sources and Mechanisms ...............................................31 Solutions............................................................32 Conclusions ......................................................33 Appendix A ......................................................34 Suggested Readings....................................................34 Appendix B ......................................................35 Conference Participants ................................................35 POLLUTION IN THE OCEAN 7 8 POLLUTION IN THE OCEAN Introduction Pollution is the release of undesirable substances into the environment. A pollutant can be any substance whose nature, location, or quantity produces undesired change in the physi- cal, chemical, or biological char- acteristics of air, water, or land. Universal Dumping organisms and humans. On a larger scale, Ground it threatens biodiversity, climate, and the preservation of some of the most treasured What if your neighbors dumped their trash locations on the planet. Notwithstanding, into your backyard every day, and no one pollution costs us billions in terms of tourism ever came to pick it up? It would probably revenue, coastal economic activities, and lost get pretty smelly and you might not want resources. to live there anymore. Our global backyard, the ocean serves as a place for all of us to work and play and harvest food. As in this What can we do? The good news is that, because much pollu- scenario, though, it has been treated for tion is caused by humans, we also have the many years as a waste receptacle. As human ability to reduce or eliminate it. Through population has increased, so has our resource regular monitoring, established treatment consumption and creation of waste products. methods, innovative science and technol- Since everything flows downhill, much of ogy, and environmentally aware policies, our waste ends up in the ocean, the ultimate some pollution effects can be contained and catchment. reduced. Many important action steps have At one time, people thought the ocean’s already been taken: “scrubbers” have been vastness could dilute waste well enough installed on coal power plants to reduce air to eliminate its impacts. However, we now pollutant emissions, advanced wastewater known that some pollutants remain in the treatment plants have been built along the environment for years, decades, or even coasts to break down pollutants in sewage, centuries, and can significantly alter marine use of some dangerous pollutants have been ecosystems. The ocean is not able to convert, banned or restricted, and technologies to assimilate, or otherwise rid itself of all the help prevent and treat oil spills are improv- waste we produce. Instead, it may be altered ing. Despite some successes in reversing the in ways that people never expected, limit- hazardous effects of pollution, much work ing our ability to enjoy and reap the ocean’s remains to be done to protect the ocean’s benefits. health for future generations. Consequences of Pollution Know your Pollutants? Ocean pollution was ignored for years, but What do you think of when you hear the in recent decades the consequences have word pollution? Many people envision a become more visible. On an individual level, shorebird covered in black oil, or toxic green pollutants can cause detrimental effects to ooze being poured into a river. The real- the activities, health, and survival of marine ity is that many of the pollutants we think POLLUTION IN THE OCEAN 9 about have a smaller impact on ocean health areas uninhabited by humans. than others, some of which we cannot even see. Even too much of a seemingly harmless In addition to the major pollutant types substance can have deleterious effects on the described here, scientists are just beginning environment. For instance, small quanti- to study a new class of pollutants (called con- ties of elemental phosphorus and nitrogen taminants of emerging concern) that have are vital to life for people, animals, aquatic unknown fates and effects in the environ- plants, and food crops. When these nutrients ment. For example, pharmaceuticals con- are released into aquatic ecosystems in high taining hormones may be excreted in urine, concentrations, though, they can drastically bypass wastewater treatment systems, and over-fertilize algae. Because high nutrient lev- end up the ocean, with the potential to affect els are linked to algal overgrowth, dissolved fish reproduction and population dynamics. oxygen reduction, dead zones, and fish kills, More research is needed to understand the they are now recognized as leading pollut- risks posed by emerging contaminants, and ants in the world’s coastal zones. CO2 is an- therefore be able to manage their effects. other example of an invisible substance that may have quite harmful systemic impacts on The sections that follow highlight some of the ocean when present in excess. the major known types of pollution, de- scribing their consequences, sources, and Ocean pollutants vary widely, ranging from some potential solutions. These have been toxic chemicals to discarded toys to sound
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